Improvement in sectional steam-boilers



iz Sheets-.sheet 1.

F. TRUMP.

SECTIONAL STEAM BOILER.

Y Patented Feb. 6,1877.

No.187,ZOO.

2 Sheets-Sheet 2. F. TRUMP.

SECTIONAL STEAM BOILER.

Patented Feb. 6, 1877.

'UNITED vSg,cierras PATEN'1- OFFICE FULLER TRUMP, OF SPRINGFIELD, OHIO.

IMPROVEMENT lN SECTIONAL STEAM-BOILERS,

Specification forming part of Letters Patent No. 187,200, dated February 6, 1877; application filed August 23, 1876.

To allwhom 'it may concern:

Be it known that I, FULLER TRUMP, of Springfield, Clarke County, State of Ohio, have invented an Improvement in Steam- Boilers, of which the following is a specification:

My invention has for its object the production of a steam-boiler adapted to be made of wrought-iron at those portions submitted to tensile strain, and of cast iron in those parts called upon to receive compression only, and of such construction generally as that the iiues both from the fire and return may be attached entire to one end of the boiler-shell,

and the tire-box detached from the tubes byl the release of exterior bolts, and the joints of the tubes so disposed as to give convenience for effecting tightness, and provision for free expansion and contraction.

My invention, which is adapted for application to both horizontal andvertical boilers, consists, first, in a peculiar arrangement of the tubes attached to the lire-box, by which single, direct, and double return flues are provided; second, in the peculiar arrangement of the joints of the tubes, by which convenience of manufacture and free expansion and contraction are provided for.

Figure 1 is a perspective view of my improved boiler, exclusive of the shell. Fig. 2 is a perspective view of my improved boiler complete. Fig. 3 is a sectional view of my boiler taken diagonally through the system of direct smoke-conducting pipes, and at an angle to its normal vertical line. Fig. 4 is a sectional plan of my improved boiler taken on the line m a', Fig 2.

A is the shell of the boiler, provided with cast-metal heads, while of itself wrought metal, which wrought metal is used upon account of lightness and extreme durability under tensile strain.

The head al is provided with the usual manhole, while the head a2 constitutes the opposite end of the boiler, and is formed, in common with the fire-box B, of the same body of metal, but of increased area, to form a projecting flange, a.

To the inner flanged end b of the re-box is secured a system of cast-metal direct flametubes, C, preferably four in number, and cast solid together upon a circular iange, b1, through which they connect with, and by which they are secured to, the fire-box B, by means of bolts b2, conveniently reached for adjustment from the interior of the fire-box.

To the farther end of these direct tubes is cast a projecting lug, c, to, when the pipes are in position, engage loosely with a socket, a3, upon the boiler-head al, in a manner to support the tubes in position and allow for expansion in that direction of the tubes when heated. Connected to these direct pipes is Va system of double return pipes, D, each direct pipe connecting to a pair of these return pipes, which are cast together, and have but a common opening, d, to the pipe C.

The pipes C are provided with openings c1, to correspond with the openings d in pipe D, and the two classes of pipes are secured together at this point by means of bolts c2, which keep the ground-joint faces c3 of the pipes perfectly in contact. These return pipes extend forward the full length of the boiler, and attach rigidly with ground joints d1 against the boiler-head ange a by means of exterior bolts and nuts ai, that can be reached from the outside to adjust.

In this manner the cast lire-box and direct and return tubes are secured solely to one end of the boiler, and the other ends, while supported to the opposite end of the boiler, are left free to expand and contract under sudden heat, and under which, if the cast parts were secured rigidly to both ends of the wrought parts, they would fracture, owing to the unequal subjection to heat, and the unequal powers of expansion and contraction ot' the two styles of metal. And the manner of securing the tubes and fire-boxes by exterior bolts renders the adjustment of the parts of the boiler together of convenient labor, and the detachment of the various parts of equal ease. It will be seen that the planes of the joints c3 and d1 are at right angles, and thus an ease of adjustment and durability of joint under expansion and contraction above the average capability is provided.

Having thus described my invention, I claim- 1. The combination of fire-box B, direct iues G, and return iiues D, all secured to One end of the boiler, the adjacent ends of the under unequal expansion and contraction, I

direct ues and return ues being secured tosubstantially as specified. gether for direct communication, substantially In testimony of which invention I hereunto as and for theipurpose speeied. set my hand. 4

2. The combination of nre-box B and ues CY and D, the fines D being secured by a transverse joint to the end of the boiler and Witnesses:

to the ues O by a longitudinal joint adapted A. T. BYERS, to permit the lues to move on one another `RoBT. G. RODGERS.

FULLER TRUMP. 

